Patent US3140949A successfully refreshed from Google Patents.
US3140949A
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Printout process and leuco bases of triphenyl methane dyes used therein
Assignee: Horizons Inc
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Filing: 1962-06-07
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Granted: 1964-07-14
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Expires: 1982-06-07
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sprague
- 👤 John A Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:39
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/675; G03C1/72; G03C1/73; G03C1/732
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A PHOTOGRAPHIC MATERIAL COMPRISING A COMPOSITION CONSISTING ESSENTIALLY OF A LEUCO BASE OF A TRIPHENYL METHANE DYE REPRESENTED BY THE GENERAL FORMULA
Claim 2
Dependent Claim
22 words
A PHOTOGRAPHIC MATERIAL COMPRISING A COMPOSITION CONSISTING ESSENTIALLY OF A LEUCO BASE OF A TRIPHENYL METHANE DYE REPRESENTED BY THE GENERAL FORMULA
References Cited (Backward Citations)
US2325038A
Cited
US2366179A
Cited
US2441561A
Cited
US2528496A
Cited
US2829052A
Cited
US2927025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |